Bellows



UNITED STATES PATENT OFFICE.

JOHN H. F. HANKWITZ, OF FOND DU LAO, WISCONSIN.

BELLOWS.

SPECIFICATION formingpart of Letters Patent No. 243,886, dated July 5, 1881. Application filed April 16, 1881. (Model) To all whom it may concern Be it known that I, J. H. FERDINAND HANK- WITZ, ofFond du Lac, in the county of Fond du Lac and State of Wisconsin, have invented a new and Improved Bellows, of which the following is a specification.

The object of my invention is to provide new and improved bellows which will be more durable than the bellows in use heretofore.

The invention consists of a bellows having the folding sides made of triangular plates or boards hinged to each other and to the top, bottom, or intermediate boards of the bellows, thejoints being covered with a strip ot'leather, rubber, or other similar material.

The invention further consists in hinging the sections forming folding sides to each other by means of cords passed transversely through the sections from edge to edge.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of my improved bellows. Fig. 2 is a plan View of the under side of the same. Fig. 3 is a detail side elevation of one of the folding sides.

Similar letters of reference indicate corresponding parts.

The sides of the bellows are formed of triangular boards or plates A, which are hinged to each other and to the top, bottom, and intermediate boards, B, O, and D, respectively, by cords E passing transversely through the boards or plates A A from edge to edge, as shown in Fig. 3, the ends ofthese cordsbeing fastened to the top, bottom, or intermediate boards. The joints are covered by strips F, of leather or equivalent material, to prevent the escape of air. The top board, B, and the bottom board, 0, are hinged to the rigid intermediate board, D, at one end, an upper compartment, H, and a lower compartment, J, being 7 thus formed in the bellows. The bottom board, 0, is provided with an aperture, G, closed by substantially as herein shown and a valve, K, on the inner side of this board, and the intermediate board, D, is .provided with an aperture, L, closed by a swinging valve, Q, on the upper side of the board D. A nozzle or pipe, M, conducts the compressed air from the upper compartment, H, to a furnace, 850. A rod is attached to the rear end of the bottom board, 0, and to the end of a lever, O, pivoted on the cross-piece P of the supporting-frame of the bellows.

The operation is as follows: If the outer end of the lever O is depressed, the rear end of the bottom board, 0, will be raised. The airin the compartment J will be compressed and forced into the compartment H and through the nozzle M to the furnace, When the outer end of the lever O is raised the rear end of the bottom board, 0, will be lowered, and the valve K is opened to admit air into the compartment J, which air is compressed and forced into the compartment H as soon as the outer end of the lever is depressed again. The lower com partment must be smaller than the upper compartment, H, as the blast would otherwise be too strong.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. The folding sides for bellows, made'substautially as herein shown and described, of triangular boards or plates hinged to each other and t0 the top and bottom boards ofthe bellows.

2. In a bellows, the combination, with the top and bottom boards, of the triangular plates or boards A and the cords E passing transversely through these plates from edge to edge, described, and for the purpose set forth.

JOHN HERMANN FERDINAND IIANKWI'lZ; 'Witnesses:

O. L. ENeKINe,

F. L. D. EYCLESHIMER. 

